Liquid cooling device and manufacturing method thereof

Abstract

A liquid cooling device includes a thermally conductive base, a cover, and a metallic partition. The thermally conductive base has a fluid chamber and a plurality of fins. The fins are located in the fluid chamber and protrudes from an inner surface of the thermally conductive base facing the fluid chamber. Every two of the fins located adjacent to each other define a channel therebetween. Distal ends of at least part of the fins located away from the inner surface together form a covering structure partially coving the channels. The metallic partition is located between and welded to the covering structure and the cover.

What is claimed is: 
     
       1. A liquid cooling device, comprising:
 a thermally conductive base, having a fluid chamber and a plurality of fins, wherein the plurality of fins are located in the fluid chamber and protrudes from an inner surface of the thermally conductive base facing the fluid chamber, every two of the plurality of fins located adjacent to each other define a channel therebetween, distal ends of at least adjacent three of the plurality of fins located away from the inner surface together form a covering structure integrally formed as one piece with the at least adjacent three of the plurality of fins, and the covering structure partially covers the channel and extends between the at least adjacent three of the plurality of fins, the covering structure has an opening in fluid communication with the channel; 
 a cover, having an inlet and an outlet, wherein the cover is mounted on the thermally conductive base and covers the fluid chamber, and the inlet is in fluid communication with the outlet via the fluid chamber; and 
 a metallic partition, located between and welded to the covering structure and the cover. 
 
     
     
       2. The liquid cooling device according to  claim 1 , wherein the plurality of fins are formed by skiving process. 
     
     
       3. The liquid cooling device according to  claim 1 , wherein the metallic partition has a first through hole, the first through hole is in fluid communication with the channel via the opening, and the inlet is in fluid communication with the outlet via the first through hole, the opening, and the channel in the fluid chamber. 
     
     
       4. The liquid cooling device according to  claim 1 , wherein the thermally conductive base has a contact surface facing away from the inner surface. 
     
     
       5. A manufacturing method of a liquid cooling device, comprising:
 forming a plurality of fins on a thermally conductive base; 
 forming a covering structure integrally formed as one piece with the plurality of fins on ends of the plurality of fins, wherein the covering structure partially covers a plurality of channels between the plurality of fins, and the covering structure extends between at least three of the plurality of fins which are adjacent, the covering structure has an opening in fluid communication with the plurality of channels; and 
 welding a metallic partition on the covering structure. 
 
     
     
       6. The manufacturing method according to  claim 5 , further comprising welding a cover on a surface of the metallic partition facing away from the covering structure. 
     
     
       7. The manufacturing method according to  claim 5 , wherein the plurality of fins are formed by skiving process. 
     
     
       8. The manufacturing method according to  claim 5 , wherein the step of forming the covering structure on the ends of the plurality of fins comprises compressing the ends of the plurality of fins to form the covering structure.